Helmet vs Facemask CPAP in COVID-19 Respiratory Failure: A Prospective Cohort Study.

"Financial/Nonfinancial Disclosures The authors have reported to CHEST the following: J. M. A.-Í. discloses a relationship with Vygon. D. L. G. has received payments for travel expenses by Getinge and Air Liquide; speaking fees from Intersurgical, Gilead, Pfizer, General Electric Healthcare, and Fisher & Paykel; and discloses a research grant from General Electric Healthcare. None declared (N. C.-A., G. C. M., M. L. V., G. M.). AcknowledgmentsAuthor contributions: N. C.-A. and D. L. G. conceived the study. All authors contributed to data acquisition. N. C.-A. and G. C. M. conducted statistical analysis. N. C.-A. and G. C. M. interpreted the data and wrote the first draft of the manuscript. D. L. G. critically revised the manuscript. All the authors reviewed the final draft of the manuscript and agreed to submit it to CHEST."